Compilare: user.cpp: In function ‘int main()’: user.cpp:39:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses] f[1]=num=1; ^ user.cpp:40:8: warning: unused variable ‘w’ [-Wunused-variable] pq w,b; ^ user.cpp:40:10: warning: unused variable ‘b’ [-Wunused-variable] pq w,b; ^ user.cpp:34:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cablaj.in","r",stdin); ^ user.cpp:35:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cablaj.out","w",stdout); ^ user.cpp:36:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:38:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a[i].x,&a[i].y); ^